Problem copying ML-TADAH during install

Make lib-tadah.lammps successfully built the library, however there was a problem "copying ML-TADAH directory to LAMMPS src directory" - "could not copy ML-TADAH". As a result, make yes-ml-tadah failed due to being unable to find the directory.  This was not a permission issue, since the same error occurred when running sudo make.

Disutils (to my knowledge) is not often pre-installed with python, switching the copy path function to shutil fixed the problem.